In "Call of Duty: Black Ops 6", canceling while gliding is an important advanced movement skill in the game, and the method used is to press the jump key during gliding. This will end the slide after a quarter of a second and leave you in a crouched position.
How to cancel sliding in Call of Duty 21 Black Ops 6
The first thing you should master is taxi cancellation, which is a technique for ending your taxi early. While gliding, just press the jump button. This will end the slide after a quarter of a second and leave you in a crouched position. You can then run immediately to get back up. This is very easy to do and gives you a lot of control over the distance you glide.
If you have trouble with slide cancel, you can try adjusting your keybindings. Players using a controller can bind the jump key to a button, stick, or pedal (if the controller has one). Players using a mouse and keyboard should have no problem finding a comfortable binding.